National Occupational Competency Testing Institute (NOCTI) Culinary Practice Exam

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What is the primary leavening agent used in the production of cakes?

Liquids
Eggs
Baking powder
Baking soda

The correct answer is: Baking soda

Baking powder is the primary leavening agent used in the production of cakes because it contains both an acid and a base, which react when moistened and heated to produce carbon dioxide gas. This gas creates bubbles in the batter, helping the cake to rise and achieve a light, airy texture. The balanced formulation of baking powder ensures consistent leavening, making it ideal for the delicate structure of cakes. While baking soda can also serve as a leavening agent, it requires an additional acid in the recipe, such as vinegar or yogurt, to activate it. Eggs contribute to the structure and moisture of the cake, but they are primarily responsible for binding and creating richness rather than being a direct leavening agent. Liquids are essential for hydrating the ingredients but do not act as leavening agents on their own. Thus, baking powder stands out as the most vital ingredient for leavening in cake production.